Q1/ In a Hartnell governor, the length of the ball arms is 190 mm, that of the sleeve arms is 140 mm, and the mass of each ball is 2.7Kg. The distance of the pivot of each bell - crank lever from the axis of rotation is 170 mm, and the speed, when the ball arm is vertical, is 300 r.p.m. The speed is to increase 0.6 per cent for a lift of 12 mm of the sleeve. 1- Neglecting the dead load on the sleeve, find the necessary stiffness of the spring and the initial compression. 2- What spring stiffness and initial compression would be required if the speed is to remain the same for the change position of the sleeve.

Q1/ In a Hartnell governor, the length of the ball arms is 190 mm, that of the sleeve arms is 140 mm, and the mass of each ball is 2.7Kg. The distance of the pivot of each bell - crank lever from the axis of rotation is 170 mm, and the speed, when the ball arm is vertical, is 300 r.p.m. The speed is to increase 0.6 per cent for a lift of 12 mm of the sleeve. 1- Neglecting the dead load on the sleeve, find the necessary stiffness of the spring and the initial compression. 2- What spring stiffness and initial compression would be required if the speed is to remain the same for the change position of the sleeve.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

Q1/ In a Hartnell governor, the length of the ball arms is 190 mm, that of the sleeve arms is 140 mm, and the
mass of each ball is 2.7Kg. The distance of the pivot of each bell - crank lever from the axis of rotation is 170
mm, and the speed, when the ball arm is vertical, is 300 r.p.m. The speed is to increase 0.6 per cent for a lift of
12 mm of the sleeve.
1- Neglecting the dead load on the sleeve, find the necessary stiffness of the spring and the initial
compression.
2- What spring stiffness and initial compression would be required if the speed is to remain the same for the
change position of the sleeve.
‒‒‒-

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